media: dvb_frontend: fix ifnullfree.cocci warnings

drivers/media/dvb-core/dvb_frontend.c:154:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values.

 NULL check before some freeing functions is not needed.

 Based on checkpatch warning
 "kfree(NULL) is safe this check is probably not required"
 and kfreeaddr.cocci by Julia Lawall.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

Fixes: b1cb7372fa82 ("dvb_frontend: don't use-after-free the frontend struct")

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 4eedaa5922ebffc3b01fc61ea473c8794e49d4fb..e8c7ded5570b0f67003d162d2d2fed8f9f27bcda 100644 (file)
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -150,8 +150,7 @@ static void __dvb_frontend_free(struct dvb_frontend *fe)
 
        dvb_frontend_invoke_release(fe, fe->ops.release);
 
-       if (fepriv)
-               kfree(fepriv);
+       kfree(fepriv);
 }
 
 static void dvb_frontend_free(struct kref *ref)